Rotary disk drill



1,646,620 Oct. 25, 1927. J. W LOY ROTARY DISK DRILL 'Filed sept. 4. 1923 Patented Oct. 25, 1927. l

I UNITED STATES 1,646,620 PATENT OFFICE.

JAMES W. LoY, or LoNG BEACH, CALIFORNIA, AssiGNon oF oNE-HALF Iro F. ivi.

risHBACmoF LONG BEACH, CALIFORNIA.

ROTARY DISK DRILL.

My invention relates to rotary disk drills, and has among its salient objects to pro; vide a rotary disk drill having three rotary disks, set at angles to each other, and mounted to move about the longitudinal axis of the drill shank in which said rotary disks are mounted, as said drill shank is rotated, said rotary disks being so disposed that their bodily movement in operation causes them to rotate about their own axes ;r to provide an improved type or form of rotary disks, each having two cutting edges;.to provide iinproved axles or bearing pins upon which said rotar improved oxings or bearing sleeves for said rotary disks; and, in general, to provide an im roved, practical and more efficient rotary dis drill for deep well drilling.

In order to fully explain my invention,

I have illustrated one practical embodiment thereof on the accompanying sheet of drawings, in which, l

igure 1 is a side elevation of a rotary disk drill embodying my invention;

Figure 2 is a bottom plan View thereof;

Figure 3 is an enlarged side View of the lower end of one of the legs and a disk;

.Figure 4 is a sectional view thereof taken on line 4 4, of Fig. 3; and Figures 5,- 6

and 7 are sectional views respectively, on

lines 5 5, 6 6 and 7 7, o Fig. 4.

Referring more inl detail Ito the drawings, 1 designates a drill head or shank having a tapered threaded upper end for connection with a drill line for turning the same, and at its lowerendY said shank is shown formed with three extensions, 3, v3, each of which extensions is formed at its lower end .with spaced legs, as 3, 3, substantially as illustrated. Between the legs, 3, 3, of each extension 3, is mounted a cutting disk 4, each disk having two cutting edges, a's 4,.4, of

substantially the form shown. A boxing or.

bearing sleeve 5, with langular sides, is iitted into said disk 'in the manner indicated in Fig. 5, and is slightly longer than the diameter of said disk, as will be seen in Fig. 4,

whereby said disk is free to rotate with little or no friction on the inside faces of the 5o legs 3, 3. -A bearing pin 6, is inserted through the le s 3, 3, and the` disk 4, therebetween, said caring pin 6, having a head 6, at one end, and being slightly-reduced in diameter, as at 6b within the bearing sleeve w'or boxing 5, of the disk 4, and at its other disks are mounted; to provide end it is shown to be further reduced in diameter, as at 6C, and is internally threaded to receive a screw plug, 7, the head of which bears against the outer side of the le 3, substantially in the manner shown in igs. 3 and 4. Said leg 3a, in its opening which receives the end, 6, of said bearing pin, 6, is providedavith a transverse channel, as 3", opening'inwar'dly, as indicated in F ig. 4,

said channel 3b being wider for a part of .its 65 length, as at 3c, and forming a sort of bayonet slot to receive a lug, 6d, formed on the end 6c of said bearin pin 6, and at one side thereof, whereb as earing pin is inserted through said eg 3, its lug, 6d, moves 70 through said channel, 3", until said bearing pin is fully in place,'and then said 'pin is turned to move said lug 6d,- into the wider portion of said channel, 3", whichforms a seat to receive the same. A separate ieee 8 is then inserted into'the end of said c aniiel 3", at the side of said lugs 6, to prevent said pin from turning, as in Fig. 7. When the screw plug is screwed into the end of said bearing pin, as in Fig. 4, said parts are locked in place. In order to lock the screw plug 7 in place, a lock screw 9 is\screwed into the side of the leg 3a with its headin interlocking en agement with the head of the screw plug l Thus Ihave provided an improved rotary disk drill having therein a plurality of rotary cutters standing in vplanes at an les to each other and at angles to the ra ial, whereby as -said drill is rotated in operation, said 'disks' are caused to rotate about their ownaxes. It is to be noted that no two disks stand parallel to each other, or in planes parallel to each other, but stand at angles to/each other and also at angles 05 to the radial. One of the difliculties often encountered in drilling operations is that the drilll strikes a cavity or open crack and drops into it and under the force of rotation the drill is broken or the drill casing fis twisted off. By providing a drill head with three drilldisks at anglesl to each other and also at angles to the radial, there is little chance for the-drill to drop into al crack because the other disks are angles and will `support the whole. I have also provided a device with two cutting edges, axially spaced apart and while I have shown them asv interal, it will be. obvious that two disks might ge mounted together with the same result, i

nee-asa@ Las.;

here shown for illustrative purposes, realizing that changes can be made in the same Within the spiritof the invention, except as I may be limited by the hereto appended claims.

I claim:

1. A rotary disk drill including a drill shank having three leg portions each terminating in a pair of legs and three cutter disks rotatably mounted therein to move bodily around the axis of said drill shank and each standing at an angle to the radial, whereby their bodily movement in operation causesI each to revolve about its own axis, each of said cutter disks having two cutting edges of substantially the same diameter.

2. A rotary disk drill including a. drill shank having an open center longitudinally and three cutter disks rotatably mounted in the lower'end thereof and standing in planes at angles to each other and at angles to the radial, each of said disks having two integral cuttino' edges concentric with each other and spacedB apart axially thereof and a bearing axle for each supported at both ends at opposite sides of said disks.

3. A rotary disk drill comprising in combination, a drill shank, having three pairs of spaced legs, three rotary cutter disks mounted therein and standing in planes at angles yto the radial and at angles to each other, a bearing pin for cach of said cutter disks supported at both ends and having a head at one end and a screw plug at its other end. saidscrew plug having a head portion of larger diameter than the diameter ofthe end of said bearing pin, and means for locking said screw plug in place in .the end of said bearing pin.

4., A rotary disk drill comprising, in combination, a drill shank having six legs arranged in pairs, cutter disks rotatably mounted between said legs and in planes standing at angles to each other, and to the radial, a bearing sleeve in each of said disks and interlocked therewith and being slightly longer than the diameter of said disk, a bearing in through each pair of legs and said bearing sleeve, said pin having a screw plug screwed into one end thereof and a bayonet lot connection at its end with one of said egs. n

5. A rotar disk drill comprising in combination, a drill shank having three pairs of legs, cutter disks rotatably mounted between said pairs of legs, there being two concentric cutting edges axially spaced apart between each pair of legs, each cutting edge having one straight sideand one tapering side, said cutting edges following each other,

,a bearing pin foreach pair of legs and said cutter disks, and means for locking said bea-ring pin in place.

6. In a rotary disk drill, a pair of legs, a rotary cutter disk between said leUs having two concentric cutting edges axially spaced apart `and turning about the same axis, each cutting edge having one straight side and one tapering side whereby to provide a sharp cutting corner edge as the advancing part of the disk and a. bearing pin through said legs and said cutter disk, said bearing pin having a screw plug with flanged head for securing it in place in said legs.

7. In a rotary disk, drill, incombination, a drill shank having three longitudinal extensions spaced apart, each of said extensions terminating in a pair of spaced legs,

Ia rotary disk drill bit mounted between each pair of legs and the bits standing in( planes at angles to each other and at angles to the radial. wherebybodily movement. with the drill shank causes each drill bit to rotate about itsown axis` and a bearingl pin for each pair of legs and each drill bit, with a bearing sleeve in each drill bit on said bearing pin, and means for interlocking said bearing pin in place in said pair of legs, substantially as described.

8; In a rotary disk drill. a drill shank having spaced legs arranged in pairs around the center thereof, a rotary cutter having two cutter elements mounted between the legs of each pair in planes at angles to the radial of said shank in concentric relation with eachother and spaced apart axially to follow each other, a bearing pin for said rotary cutter elements, and means interlocking said bearing pin with said drill shank.

Signed at Los Angeles, Los Angeles County, California, this 24th day of August,

JAMES W. LOY. 

